preliminary, basic hookup of Family Network System base board + MMC1 cassette emulation
This commit is contained in:
g0me3
parent
4fe5da841c
commit
18165938d4
|
|
@ -0,0 +1,252 @@
|
|||
/* FCE Ultra - NES/Famicom Emulator
|
||||
*
|
||||
* Copyright notice for this file:
|
||||
* Copyright (C) 1998 BERO
|
||||
* Copyright (C) 2002 Xodnizel
|
||||
* Copyright (C) 2020 CaH4e3
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*
|
||||
* Famicom Network System Base Unit + MMC1 cartridge board
|
||||
*
|
||||
*/
|
||||
|
||||
#include "mapinc.h"
|
||||
|
||||
static uint8 DRegs[4];
|
||||
static uint8 Buffer, BufferShift;
|
||||
|
||||
static uint32 WRAMSIZE;
|
||||
static uint8 *WRAM = NULL;
|
||||
|
||||
static int kanji_pos, kanji_page, r40C0;
|
||||
static int IRQa, IRQCount;
|
||||
|
||||
static DECLFW(MBWRAM) {
|
||||
if (!(DRegs[3] & 0x10))
|
||||
Page[A >> 11][A] = V;
|
||||
}
|
||||
|
||||
static DECLFR(MAWRAM) {
|
||||
if (DRegs[3] & 0x10)
|
||||
return X.DB;
|
||||
return(Page[A >> 11][A]);
|
||||
}
|
||||
|
||||
static void MMC1CHR(void) {
|
||||
setchr8((r40C0 >> 3) & 1);
|
||||
}
|
||||
|
||||
static void MMC1PRG(void) {
|
||||
uint8 offs_16banks = DRegs[1] & 0x10;
|
||||
uint8 prg_reg = DRegs[3] & 0xF;
|
||||
setprg8r(0x10, 0x6000, DRegs[1] & 3);
|
||||
switch (DRegs[0] & 0xC) {
|
||||
case 0xC:
|
||||
setprg16(0x8000, (prg_reg + offs_16banks));
|
||||
setprg16(0xC000, 0xF + offs_16banks);
|
||||
break;
|
||||
case 0x8:
|
||||
setprg16(0xC000, (prg_reg + offs_16banks));
|
||||
setprg16(0x8000, offs_16banks);
|
||||
break;
|
||||
case 0x0:
|
||||
case 0x4:
|
||||
setprg16(0x8000, ((prg_reg & ~1) + offs_16banks));
|
||||
setprg16(0xc000, ((prg_reg & ~1) + offs_16banks + 1));
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void MMC1MIRROR(void) {
|
||||
switch (DRegs[0] & 3) {
|
||||
case 2: setmirror(MI_V); break;
|
||||
case 3: setmirror(MI_H); break;
|
||||
case 0: setmirror(MI_0); break;
|
||||
case 1: setmirror(MI_1); break;
|
||||
}
|
||||
}
|
||||
|
||||
static uint64 lreset;
|
||||
static DECLFW(MMC1_write) {
|
||||
int n = (A >> 13) - 4;
|
||||
if ((timestampbase + timestamp) < (lreset + 2))
|
||||
return;
|
||||
|
||||
if (V & 0x80) {
|
||||
DRegs[0] |= 0xC;
|
||||
BufferShift = Buffer = 0;
|
||||
MMC1PRG();
|
||||
lreset = timestampbase + timestamp;
|
||||
return;
|
||||
}
|
||||
|
||||
Buffer |= (V & 1) << (BufferShift++);
|
||||
|
||||
if (BufferShift == 5) {
|
||||
DRegs[n] = Buffer;
|
||||
// FCEU_printf("MMC1 REG%d:%02x\n", n, Buffer);
|
||||
BufferShift = Buffer = 0;
|
||||
switch (n) {
|
||||
case 0: MMC1MIRROR(); // break;
|
||||
case 1: // break;
|
||||
// case 2: MMC1CHR(); break;
|
||||
case 3: MMC1PRG(); break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void MMC1_Restore(int version) {
|
||||
MMC1MIRROR();
|
||||
MMC1CHR();
|
||||
MMC1PRG();
|
||||
lreset = 0;
|
||||
}
|
||||
|
||||
static void MMC1CMReset(void) {
|
||||
int i;
|
||||
|
||||
for (i = 0; i < 4; i++)
|
||||
DRegs[i] = 0;
|
||||
Buffer = BufferShift = 0;
|
||||
DRegs[0] = 0x1F;
|
||||
|
||||
DRegs[1] = 0;
|
||||
DRegs[2] = 0;
|
||||
DRegs[3] = 0;
|
||||
|
||||
MMC1MIRROR();
|
||||
MMC1CHR();
|
||||
MMC1PRG();
|
||||
}
|
||||
|
||||
static DECLFW(FNC_cmd_write) {
|
||||
switch (A) {
|
||||
case 0x40A6: {
|
||||
IRQCount = (IRQCount & 0xFF00) | V;
|
||||
break;
|
||||
}
|
||||
case 0x40A7: {
|
||||
IRQCount = (IRQCount & 0x00FF) | (V << 8);
|
||||
break;
|
||||
}
|
||||
case 0x40A8: {
|
||||
IRQa = V;
|
||||
break;
|
||||
}
|
||||
case 0x40B0: {
|
||||
kanji_page = V & 1;
|
||||
break;
|
||||
}
|
||||
case 0x40C0: {
|
||||
// FCEU_printf("FNS W %04x:%02x\n", A, V);
|
||||
r40C0 = V;
|
||||
MMC1CHR();
|
||||
break;
|
||||
}
|
||||
// default:
|
||||
// FCEU_printf("FNS W %04x:%02x\n", A, V);
|
||||
}
|
||||
}
|
||||
|
||||
static DECLFR(FNC_stat_read) {
|
||||
switch (A) {
|
||||
case 0x40A2: {
|
||||
int ret = (IRQa >> 1);
|
||||
X6502_IRQEnd(FCEU_IQEXT);
|
||||
IRQa = 0;
|
||||
return ret;
|
||||
}
|
||||
case 0x40B0: {
|
||||
kanji_pos = 0;
|
||||
return 0;
|
||||
}
|
||||
case 0x40C0: {
|
||||
// FCEU_printf("FNS R %04x\n", A);
|
||||
int ret = r40C0;
|
||||
r40C0 &= 0;
|
||||
return ret;
|
||||
}
|
||||
default: {
|
||||
// FCEU_printf("FNS R %04x\n", A);
|
||||
return 0xff;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static DECLFR(FNC_kanji_read) {
|
||||
int32 ofs = ((A & 0xFFF) << 5) + kanji_pos;
|
||||
kanji_pos++;
|
||||
kanji_pos &= 0x1F;
|
||||
// if (PRGptr[1] != NULL) // iNES debug
|
||||
return PRGptr[1][ofs];
|
||||
// else
|
||||
// return CHRptr[0][ofs];
|
||||
}
|
||||
|
||||
void NFC_IRQ(int a) {
|
||||
if (IRQa) {
|
||||
IRQCount -= a;
|
||||
if (IRQCount <= 0)
|
||||
X6502_IRQBegin(FCEU_IQEXT);
|
||||
}
|
||||
}
|
||||
|
||||
static void FNS_Power(void) {
|
||||
lreset = 0;
|
||||
SetWriteHandler(0x8000, 0xFFFF, MMC1_write);
|
||||
SetReadHandler(0x8000, 0xFFFF, CartBR);
|
||||
|
||||
kanji_page = 0;
|
||||
kanji_pos = 0;
|
||||
r40C0 = 0xC0;
|
||||
|
||||
SetWriteHandler(0x4080, 0x40FF, FNC_cmd_write);
|
||||
SetReadHandler(0x4080, 0x40FF, FNC_stat_read);
|
||||
SetReadHandler(0x5000, 0x5FFF, FNC_kanji_read);
|
||||
|
||||
SetReadHandler(0x6000, 0x7FFF, MAWRAM);
|
||||
SetWriteHandler(0x6000, 0x7FFF, MBWRAM);
|
||||
|
||||
FCEU_CheatAddRAM(8, 0x6000, WRAM);
|
||||
MMC1CMReset();
|
||||
}
|
||||
|
||||
static void FNS_Close(void) {
|
||||
if (WRAM)
|
||||
FCEU_gfree(WRAM);
|
||||
WRAM = NULL;
|
||||
}
|
||||
|
||||
void FNS_Init(CartInfo *info) {
|
||||
info->Close = FNS_Close;
|
||||
info->Power = FNS_Power;
|
||||
|
||||
GameStateRestore = MMC1_Restore;
|
||||
MapIRQHook = NFC_IRQ;
|
||||
|
||||
WRAMSIZE = (8 + 32) * 1024;
|
||||
WRAM = (uint8*)FCEU_gmalloc(WRAMSIZE);
|
||||
SetupCartPRGMapping(0x10, WRAM, WRAMSIZE, 1);
|
||||
AddExState(WRAM, WRAMSIZE, 0, "WRAM");
|
||||
|
||||
info->SaveGame[0] = WRAM;
|
||||
info->SaveGameLen[0] = WRAMSIZE;
|
||||
|
||||
AddExState(DRegs, 4, 0, "DREG");
|
||||
AddExState(&lreset, 8, 1, "LRST");
|
||||
AddExState(&Buffer, 1, 1, "BFFR");
|
||||
AddExState(&BufferShift, 1, 1, "BFRS");
|
||||
}
|
||||
|
|
@ -536,7 +536,7 @@ void IncrementInstructionsCounters()
|
|||
bool CondForbidTest(int bp_num) {
|
||||
if (bp_num >= 0 && !condition(&watchpoint[bp_num]))
|
||||
{
|
||||
return false; // condition rejected
|
||||
return false; // condition rejected
|
||||
}
|
||||
|
||||
//check to see whether we fall in any forbid zone
|
||||
|
|
@ -550,11 +550,11 @@ bool CondForbidTest(int bp_num) {
|
|||
{
|
||||
if (wp.endaddress) {
|
||||
if ((wp.address <= _PC) && (wp.endaddress >= _PC))
|
||||
return false; //forbid
|
||||
return false; // forbid
|
||||
}
|
||||
else {
|
||||
if (wp.address == _PC)
|
||||
return false; //forbid
|
||||
return false; // forbid
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -472,6 +472,7 @@ static BMAPPING bmap[] = {
|
|||
{ "80013-B", BMC80013B_Init, 0 },
|
||||
{ "HPxx", BMCHPxx_Init, 0 },
|
||||
{ "MINDKIDS", MINDKIDS_Init, BMCFLAG_256KCHRR },
|
||||
{ "FNS", FNS_Init, BMCFLAG_16KCHRR },
|
||||
|
||||
{ 0, 0, 0 }
|
||||
};
|
||||
|
|
|
|||
|
|
@ -159,6 +159,7 @@ void BMC8IN1_Init(CartInfo *info);
|
|||
void BMC80013B_Init(CartInfo *info);
|
||||
void BMCHPxx_Init(CartInfo *info);
|
||||
void MINDKIDS_Init(CartInfo *info);
|
||||
void FNS_Init(CartInfo *info);
|
||||
|
||||
extern uint8 *UNIFchrrama; // Meh. So I can stop CHR RAM
|
||||
// bank switcherooing with certain boards...
|
||||
|
|
|
|||
|
|
@ -458,6 +458,7 @@
|
|||
<ClCompile Include="..\src\boards\F-15.cpp" />
|
||||
<ClCompile Include="..\src\boards\famicombox.cpp" />
|
||||
<ClCompile Include="..\src\boards\ffe.cpp" />
|
||||
<ClCompile Include="..\src\boards\fns.cpp" />
|
||||
<ClCompile Include="..\src\boards\hp10xx_hp20xx.cpp" />
|
||||
<ClCompile Include="..\src\boards\hp898f.cpp" />
|
||||
<ClCompile Include="..\src\boards\ks7010.cpp" />
|
||||
|
|
|
|||
|
|
@ -1099,6 +1099,9 @@
|
|||
<ClCompile Include="..\src\input\fns.cpp">
|
||||
<Filter>input</Filter>
|
||||
</ClCompile>
|
||||
<ClCompile Include="..\src\boards\fns.cpp">
|
||||
<Filter>boards</Filter>
|
||||
</ClCompile>
|
||||
</ItemGroup>
|
||||
<ItemGroup>
|
||||
<ClInclude Include="..\src\drivers\common\args.h">
|
||||
|
|
|
|||
Loading…
Reference in New Issue